Once, during a meeting at my university, a biologist mentioned that he was the only faculty member present from a science department. When I corrected him, noting that I was from the Department of Psychology, he waved his hand dismissively, as if I were a Little Leaguer telling a member of the New York Yankees that I too played baseball.
There has long been snobbery in the sciences, with the "hard" ones (physics, chemistry, biology) considering themselves to be more legitimate than the "soft" ones ( psychology, sociology). It is thus no surprise that many members of the general public feel the same way. But of late, skepticism about the rigors of social science has reached absurd heights.
The U.S. House of Representativesrecently voted to eliminate funding for political science research through the National Science Foundation. In the wake of that action, an opinion writer for the Washington Post suggested that the House didn't go far enough. The NSF should not fund any research in the social sciences, wrote Charles Lane, because "unlike hypotheses in the hard sciences, hypotheses about society usually can't be proven or disproven by experimentation."
Lane's comments echoed ones by Gary Gutting in the Opinionator blog of the New York Times. "While the physical sciences produce many detailed and precise predictions," wrote Gutting, "the social sciences do not. The reason is that such predictions almost always require randomized controlled experiments, which are seldom possible when people are involved."
This is news to me and the many other social scientists who have spent their careers doing carefully controlled experiments on human behavior, inside and outside the laboratory. What makes the criticism so galling is that those who voice it, or members of their families, have undoubtedly benefited from research in the disciplines they dismiss.
Most of us know someone who has suffered from depression and sought psychotherapy. He or she probably benefited from therapies such as cognitive behavioral therapy that have been shown to work in randomized clinical trials.
Problems such as child abuse and teenage pregnancy take a huge toll on society. Interventions developed by research psychologists, tested with the experimental method, have been found to lower the incidence of child abuse and reduce the rate of teenage pregnancies.
Ever hear of stereotype threat? It is the double jeopardy that people face when they are at risk of confirming a negative stereotype of their group. When African American students take a difficult test, for example, they are concerned not only about how well they will do but also about the possibility that performing poorly will reflect badly on their entire group. This added worry has been shown time and again, in carefully controlled experiments, to lower academic performance. But fortunately, experiments have also showed promising ways to reduce this threat. One intervention, for example, conducted in a middle school, reduced the achievement gap by 40%.
If you know someone who was unlucky enough to be arrested for a crime he didn't commit, he may have benefited from social psychological experiments that have resulted in fairer lineups and interrogations, making it less likely that innocent people are convicted.
An often-overlooked advantage of the experimental method is that it can demonstrate what doesn't work. Consider three popular programs that research psychologists have debunked: Critical Incident Stress Debriefing, used to prevent post-traumatic stress disorders in first responders and others who have witnessed horrific events; the D.A.R.E. anti-drug program, used in many schools throughout America; and Scared Straight programs designed to prevent at-risk teens from engaging in criminal behavior.
All three of these programs have been shown, with well-designed experimental studies, to be ineffective or, in some cases, to make matters worse. And as a result, the programs have become less popular or have changed their methods. By discovering what doesn't work, social scientists have saved the public billions of dollars.
To be fair to the critics, social scientists have not always taken advantage of the experimental method as much as they could. Too often, for example, educational programs have been implemented widely without being adequately tested. But increasingly, educational researchers are employing better methodologies. For example, in a recent study, researchers randomly assigned teachers to a program called My Teaching Partner, which is designed to improve teaching skills, or to a control group. Students taught by the teachers who participated in the program did significantly better on achievement tests than did students taught by teachers in the control group.
Are the social sciences perfect? Of course not. Human behavior is complex, and it is not possible to conduct experiments to test all aspects of what people do or why. There are entire disciplines devoted to the experimental study of human behavior, however, in tightly controlled, ethically acceptable ways. Many people benefit from the results, including those who, in their ignorance, believe that science is limited to the study of molecules.
Timothy D. Wilson is a professor of psychology at the University of Virginia and the author of "Redirect: The Surprising New Science of Psychological Change."